src/statusbar/mountpointobservercache.h

   1 /***************************************************************************
   2  *   Copyright (C) 2014 by Frank Reininghaus <frank78ac@googlemail.com>    *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
  18  ***************************************************************************/
  19
  20 #ifndef MOUNTPOINTOBSERVERCACHE_H
  21 #define MOUNTPOINTOBSERVERCACHE_H
  22
  23 #include <QHash>
  24 #include <QObject>
  25
  26 class MountPointObserver;
  27 class QTimer;
  28
  29 class MountPointObserverCache : public QObject
  30 {
  31     Q_OBJECT
  32
  33     MountPointObserverCache();
  34     ~MountPointObserverCache() override;
  35
  36 public:
  37     static MountPointObserverCache* instance();
  38
  39     /**
  40      * Returns a MountPointObserver for the given \a url. A new observer is created if necessary.
  41      */
  42     MountPointObserver* observerForUrl(const QUrl& url);
  43
  44 private slots:
  45     /**
  46      * Removes the given \a observer from the cache.
  47      */
  48     void slotObserverDestroyed(QObject* observer);
  49
  50 private:
  51     QHash<QUrl, MountPointObserver*> m_observerForMountPoint;
  52     QHash<QObject*, QUrl> m_mountPointForObserver;
  53     QTimer* m_updateTimer;
  54
  55     friend class MountPointObserverCacheSingleton;
  56 };
  57
  58 #endif